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Patent searchSureChEMBLSureChEMBL provides free access to chemical data extracted from the patent literature.SureChEMBL is a freely available chemical patent service, maintained and hosted by the ChEMBL group, based at EMBL-EBI. The SureChEMBL service is aimed at helping researchers search and access the chemical data contained within the patent literature.ChEMBLEMBL-EBI